"It was at the saloon that Pat Garrett met and often gambled with William Bonney, better known as Billy the Kid. The two were seen together so often they soon took on the nicknames of "Big Casino” and "Little Casino.”
On November 7, 1880, Garrett was appointed as the Lincoln County Sheriff. Friends or not, his first vow was to bring the current reign of lawlessness to an end with the primary goal of apprehending Billy the Kid.
On December 15, 1880, Governor Wallace put a $500 reward on Billy's head and Pat Garrett began the relentless pursuit of the outlaw. Garrett set-up many traps and ambushes in an attempt to apprehend Billy, but the Kid seemed to have an animal instinct that warned him of danger. However, that was not to last.
On December 19, 1880 Garrett confronted Billy and his gang when they rode into Fort Sumner, New Mexico. Killing Tom O'Folliard, the rest of the gang escaped. Soon, the determined Garrett and his posse tracked the outlaws down to Stinking Springs and surrounded the hideout. After a several day siege, the posse killed Charlie Bowdre and captured Billy the Kid, Dirty Dave Rudabaugh, Tom Pickett and Billy Wilson on December 23, 1880.
Billy the Kid was tried and sentenced to hang in Lincoln, New Mexico on May 13, 1881. However, he escaped from jail on April 18, 1881, killing two guards in the process." Garrett went after the Kid once again and arrived at Peter Maxwell's ranch on July 14, 1881 to question him about Billy's whereabouts. As Maxwell and Garrett sat in Peter's darkened bedroom in Old Fort Sumner, Billy unexpectedly entered the room. The Kid didn't recognize Garrett in the poor lighting conditions and asked "¿Quien es? ¿Quien es?" (Spanish for "Who is it? Who is it?), to which Garrett responded with two shots from his revolver, the first striking Billy's heart. "